[v3] delete copy ctor and assignment in locale::facet, locale::id

[Paolo Carlini]

Chris Fairles wrote:
> tested x86_64, ok for trunk?
>   
Bah, frankly I don't think we are going to gain much from this kind of
change: remember that we are talking about the C++0x *experimental*
mode, not about the eventual C++1x, ABI-breaking, library. In general we
want to early implement new features, in particular when self-contained
in new headers. In general, at this stage, it doesn't make much sense to
get right small details in existing facilities...

Paolo.